Transmission-gear for motor-vehicles.



,664.- PATBNTED PEB. 13, 190e.

T. P. MBINHARD. TRANSMIS'SION GEAR PoR MOTOR VEHICLES. APPLICATION FILEDAUG. 7, 1905.

2 SHEETS--SHBET 1.

10.812,664. EATENTED EEB.13, 190B.

T. P. MEI'NHAED. TEANsMIssIoN GEAR EOE MoToE VEHICLES.

.APPLICATION FILED AUG. 7, 1905.

2 SHEETS-.SHEET 2.

i .lllsiuhA To all whom, t may concern:

i' INTTED sTATEs PATENT oEErcE. THEODORE P. MEIN HARD, OF ST. LOUIS,MISSOURI, ASSIGNOR TO ST. LOUIS CAR COMPANY, OF ST. LOUIS, MISSOURI, ACORPORATION.`

TRANSMISSION-GEAR FOR MOTOR-VEHICLES.,

Specication of Letters Patent.

Patented Feb. 1s, 190e.

Application led'August 7, 1905. Serial No. 273,139`

Be it known that I, THEODORE P. MEIN- HARD, a citizen of the UnitedStates, residing in the city of St. Louis, in the State of Missouri,have invented certain new and useful Improvements in Transmission-GearsforMotor-Vehicles, of which the following is a full,

- clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification.

My invention relates to a transmissiongear for motor-vehicles; and,brieiy. stated, it consists in means lfor shifting the reciprocatinggear members of the gear. Figure I is a View, partly in plan and partly1n horizontal section, of my gear. Fig. II is an'enlarged elevation ofthe shifting-mechanlsm-actuating rock-shaft of my transmission-gear andcoeXisting parts. Fig.' III is a vertical cross-section taken on lineIII III, Fig. I.

1 designates the housing of my transmisslon-gear. 2 is the maindrive-shaft journaled in said -housing and which may be driven byapplying power thereto in any deslrable manner. This drive-shaft haskeyed toit a direct drivin -Wheel 3 and a reverse drivin -pinion 4. T eshaft is provided interme iate of the wheel 3 and p1nion4 with feathers5.

6 is a reciprocatory gear-wheel that is fitted to the drive-shaft and isadapted to be shifted longitudinally thereof on the feathers 5.

7 designates a counter-shaft adjacent to the drive-shaft and on whichare rigidly mounted counter gear-Wheels 8 and 9, the former of which isadapted to'receive the mesh of the reciprocatory gear-wheel 6.

10 designates a driven shaft which is journaled in the housing 1 andextends parallel With the drive-shaft 2. This driven shaft is providedwith feathers 11, extending'longitudinally thereof, and it contains alongitudinal slot 12. p

13 is a toothed .driving wheel loosely mounted upon the driven shaftopposite to the toothed drive-Wheel on the drive-shaft,

these toothed wheels being adapted to be connected by a drive-chain,`through the medium of which power ma be communicated from thedrive-shaft to sald toothed Wheel 13.

14 designates a reciprocatory transmission gear-wheel mounted on thedriven shaft 10 and held from rotation thereon by the feathers 11. Thehub of this transmission gear- Wheel is rovided with an extension 15,the end of wffich terminates in a clutch member 16, that is adapted tobe moved into clutching engagement with the opposing end of theloosely-mounted toothed wheel 13.

17 1s a shift-arm fitted to the hub eXtension 15 and having a bifurcatedend 18, that is iitted to the reciprocatory gear-Wheel 6 on thedrive-shaft 2. By the provision of this shift-arm the two reciprocatorygear members 6 and 14 are so united as to move together, and whenmovement is imparted to the transmission gear-wheel 14 a corres ondingytravel is imparted to the gear-Whee 6.

19 designates al gear member from which power is transmitted to thepoint at which it 1s applied to the runmng-gear of the motorvehic e.

As the parts of my transmission-gear are illustrated in Fig. I the.transmission gearwheel 14 is in mesh with the reverse drivingpinion 4to make the'zchanges in securing direct driving action. :Thetransmission gearwheel 14 is first shifted on the driven shaft until itis freed from the reverse driving-pinion, thereby rendering the gearingnatural, The movement of the transmission gearwheel carries it into meshwith the counter gear-wheel 9 and also causes the gear-wheel 6 to becarried into meshwith the counter gear- Wheel 8, whereby the motion ofthe driveshaft 2 is communicated through the gearwheel 6 to the countergear-wheel 8 and through the counter-shaft 7 to the counter gear-wheel9. p From the last-named counter gear-wheel the motion is transmitted tothe transmission gear-wheel 14 to drive said lastnamed gear-wheel androtate the driven shaft 10. Under the driving action just eX lained alow speed is secured.' When a hig lspeed is to be secured, thetransmission ear-wheel 14 is moved in the direction of lts formermovement until its clutch member 16 isl brought into engagement with thelooselymounted toothed Wheel 13, the transmission gear-Wheel 14 and theear-Wheel 6 being thereby shifted out of mes with the countergear-wheels 9 and 8. At this time the oosely-mounted toothed Wheel 13,being in clutching engagement with the transmission gear-wheel 14, thetoothed wheel 3,acting to drive the toothed Wheel 13, causes saidtoothed Wheel to drive the transmission gearwheel, and as a consequencethe driven shaft is driven direct from the driveshaft 2, therebyIsecuringa high speed of rotation of the driven shaft.

I will next describe the shifting means by which the transmissiongear-wheels 6 and 14 are reciproc'ated to change the speeds in mytransmission-gear. 1

2() designates a vslide-rod that is loosely mounted in the driven shaft.1() and extends therethrough to the slot 12 in said shaft. -21 isv across-bar seated in the inner end of this slide-rod and extending intothe slot in the driven shaft to reciprocate therein u on thereciprocation of the slide-rod. The s ide-bar 21 is seated in the hubextension'15 of the transmission gear-wheel 14, as seen in Fig. Hl,thereby providingI for they actuation of said transmission gear-wheel ina sliding manner upon the driven shaft when the sliderod is reciprocatedwithin said shaft. By this means the transmission gear-wheel 14 is movedto the desired positions to change the speed, and the gear-wheel 6 ismoved correspondingly throughthe medium 'of the shiftarm 17. 'd

22 is a yoke fitted tothe outer end of the slide-rod 20, and 23 is alink-bar pivoted to said yoke.

24 designates a bracket secured to a fixed part of the motor-vehicleframe-as, for instance, the member A. (See Figs. 1 and Il.)

, This bracket is provided with a tubular upper member 25, that ,bears anotched wnig 26, and at the lower end of the bracket isv an arm 27. Y

28 designates arock-shaft that is loosely mounted in the member of thebracket 24 and the lower end of which is seated inthe bracket-arm 27. l

29 is a handle fixed to the u per end of the rock-shaft 28 and through te medium of which it may be lifted to the desiredextent' for-the purposehereinafter namedand rotated.

30 is a retaining-armvfixed' to the rockshaft and having a tooth 31,that is adapted to enter either of the notches in the bracketwing 26accordin to the degree of rotation of said rock-'sha t and the shiftingof the reciprocating members of the transmissiongear.

32 is a retractile spring surrounding the rock-shaft beneath the tubularbracket meinber 25 and bearing against a collar 33 on said shaft. Thissprin serves to yieldingly hold the rock-shaft in owered position, so,that

thev retaining-arm 30 will be maintained with 4 upon siaecfi its toothin one ofv the bracket-arm wingnotches to hold the shaft from rotation,the spring being susceptible of yieldingr to permit of the rock-sliaftbeing elevated when it is to be rotated to withdraw the retainingarmfrom engagement with the bracket-Wing.

34 isa crank-arm fixed to the rock-shaft 28. To the outer end of thiscrank-arm is pivoted a link 35, that is in turn pivotall connected at 36to the link-bar 23. It will e seen that when the rock-shaft is elevatedto release it and rocked the slide-rod 20 will be actuated through themedium of the parts intervenin between the crank-arm 34 and saidslide-ro to reciprocate the slide-rod and shift the transmission gearmembers 14 and 6 to the various positions hereinbefore referred to.

l claimV as my invention- 1. 1n a transmission-gear,the combination of ashaft, a gear member slidabl'y mounted upon said shaft, a slide rodextending through said shaft and having engagement with said gearmember, and a rock-shaft having connection with said slide-rod,substantially as set forth.

2. In'a transmissionear, the combination of a shaft, a gear mem erslidably mounted through. said shaft and having engagement with saidgear member, a rock-shaft having"l connection with said slide-rod, andmeans carried by said rock-shaft for-holding it in adjustedpositions,.substantially as set forth.

3. 1n a transmission-gear, the combination of a shaft, av gear memberslidably mounted upon said shaft, a slide-'rod extending through saidshaft yand havin connection with saidv gear member, a roc -shaftconnected to said slide-rod, an arm carried by said shaft, a slide-rodextending said rock-shaft for restrainin it from rotation, and a springfor yielding y holding said rock-shaft from longitudinal movement,substantially as set forth.

4. In a'transmission-gear, the combination of a shaft, a ear memberslidably mounted through said shaft and having connection with said gearmember, a bracket, a rockshaft connected to said slide-rod and mountediny said bracket, and an arm carried by said rock-shaft; said bracketbeing provided with a notched head to receive said arm and restrain saidrock-shaft from rotation, substantially as set forth.

THEODORE P.- MEINHARD. In presence of NELLIE V. ALEXANDER, v E. S.KNIGHT.

loo

upon said s aft'. and a slide extending4

